Ruth Gavison is one of Israel's most prominent law professors (constitutional law, philosophy of law). She used to be closely identified with human rights, and in the late 1990s she was even the Chair of the Association for Civil Rights in Israel. Since then, however, she has been branded a heretic by her previous allies, because she has become critical of the political agenda of the ideological Left. A few years ago Zipi Livni, at the time minister of justice, tried valiantly to have her appointed to the supreme court, but this was blocked by Chief Justice Barak who made no secret of his displeasure with her opinions regarding the scope of what the court should be dealing with. No-one, by the way, doubts her capabilities; it's her opinions which are the problem.
As can be seen in this article, where she takes on two accepted themes of parts of the so-called "peace camp" (so-called by itself, that is). First, she warns, Israel must be very careful not to give the Palestinians legal basis for future claims by agreeing to accept the principle of a Palestinian right of return in exchange for a willingness not to demand it in practice. The legal implications of the Israeli agreement would set the stage for future Palestinian claims, irrespective of what they might say at the moment of the agreement.
Her second point is that Israel has as much right to a nation state (for the Jewish nation) as anyone else has, such as the Palestinians. You'd think this would be self evident, but of course it's anything but.